View source for Digital-Divide/D0/Getting-to-know-computers/English-timed

{| border=1
| Time
| Narration

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|  00:01
| Welcome to the Spoken Tutorial on '''Getting to know Computers'''

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|  00:06
| In this tutorial we will learn about 

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| 00:09
| the various components of a '''computer. '''

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| 00:11
| We will also learn to connect the various components. 


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| 00:15
| Generally, there are 2 types of '''computers - '''

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|00:18
| ''' Desktop'''  or '''Personal Computer''' and '''Laptop'''


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| 00:23
| Now-a-days, '''tablet PCs''' or '''tabs''' for short, are also quite popular. 

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|  00:31
| Functions of a computer. 

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|  00:33
| A '''computer''' performs five major functions irrespective of its size - 


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|  00:40
| it accepts '''data''' or ''' instructions''' by way of '''input '''

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| it processes '''data''' as required by the user 

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| it stores '''data''' 

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| 00:52
| it gives results in the form of '''output '''

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|  00:56
| it controls all '''operations''' inside the '''computer '''

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|  01:01
| Basic organisation of a '''computer''' is as shown in this block diagram. 

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| '''Input unit '''

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| '''Central Processing unit '''

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| '''' Output unit '''

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|01:14
|The ''' Input unit''' helps to 

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|01:16
|enter the '''data''' and '''programs''' into a '''computer''' system in an organised manner 


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|  01:23
| ''' Keyboard, mouse, camera''' and '''scanner''' are some of the '''input devices.'''

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| The ''' Central Processing unit '''

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| performs '''operations''' like '''arithmetic''' and ''' logical''' operations and 

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| stores '''data''' and '''instructions '''
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| Typically, the ''' Central Processing unit''' or '''CPU''' looks like this.  

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| It has many ''' ports''' in the front and at the back of the '''unit. '''
 

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|01:53
|We will learn about them in a little while. 


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| 01:57
| It takes '''data''' and '''instructions''', processes them and gives the '''output''' or results. 

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| The task of performing '''operations''' is called '''processing. '''


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|  02:11
| The '''output''' is then stored along with the '''data''' and ''' instructions''' in the '''storage unit. '''


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| 02:18
| The unit that supports the process of producing results from the data, is the '''output unit.'''

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|  02:26
| '''Monitor''' and '''printer''' are some of the '''output devices. '''


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|  02:33
| Generally, a '''desktop computer''' has 4 main components 

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|'''Monitor'''

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| '''CPU'''

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| ''' Keyboard''' 

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| 02:41
|and  '''Mouse '''

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|  02:43
| A ''' camera, printer''' or '''scanner''' can also be connected to a computer. 

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|  02:50
| This is a '''monitor''' or the '''computer screen''', as we call it. 

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|  02:55
|It looks like a '''TV screen.''' 
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|It is the '''visual display unit''' of a '''computer. '''

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| 03:02
| It displays the '''computer's user interface. '''

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|*One can open various '''programs''' and interact with the '''computer''', using the keyboard and mouse. 

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|  03:13
|The ''' keyboard''' is designed to enter text, characters and other commands into a '''computer.'''

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|  03:21
|This is the '''computer mouse.''' 
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| 03:24
| Typically, it has 2 clickable buttons and a '''scroll''' button in between. 


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|  03:31
| Pressing the ''' left mouse button''', activates most actions. 

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|  03:35
| Pressing the ''' right mouse button''', activates more non-standard actions like shortcuts. 

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|The '''mouse wheel''' is used to scroll up and down, by rolling the '''scroll button. '''

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|  03:49
| The ''' computer mouse''' is an alternative way to interact with the '''computer''', besides the ''' keyboard. '''

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| 03:57
| Now, let us see the various parts of the '''CPU.'''

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|  04:02
| There is a prominent button on the front of the '''CPU''' which is the ''' POWER ON''' switch. 

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| 04:08
| To turn on the '''computer''', one needs to press this switch. 

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| 04:14
| There is a '''reset''' button, too, which helps us to restart the '''computer''', if required. 

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|  04:21
| Also, on the front side, you will notice 2 or more ''' USB ports''' and a ''' DVD/CD-ROM reader-writer. '''

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|  04:30
|The ''' USB ports''' are used to connect ''' pen-drives''' to the ''' computer. '''

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|  04:35
| And the ''' DVD/CD-ROM reader-writer''' is used to read or write a ''' CD''' or a '''DVD.'''

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|  04:43
| Now let's look at the back of the ''' computer. '''

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|  04:48
|The '''ports''' at the back, are used for connecting the '''CPU''' to the other devices of the '''computer. '''

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|This is done using '''cables.'''

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|  04:58
|There are many '''components''' inside the '''CPU. '''

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|  05:02
|When the ''' computer''' is on, all these components work and generate heat. 

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|  05:08
|Fans at the back provide the air flow required to cool the components. 

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|  05:14
|Otherwise, overheating can cause damage to the '''CPU,''' often leading to '''data''' loss. 


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|  05:21
|This is the '''case cooling fan. '''

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|  05:23
|It keeps the temperature of the '''CPU''' normal and prevents overheating. 


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|  05:30
|''' Power Supply Unit,''' also called '''PSU''', supplies power to the computer. 

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|  05:37
|Now, let's learn how to connect the various components to the '''CPU.''' 

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|  05:42
|Place all the components on the table, as shown. 

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|  05:46
|Place all the cables on the table, as shown. 

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|  05:51
|First, let's connect the '''monitor''' to the '''CPU. '''

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|Connect the '''power cable''' to the ''' monitor''', as shown. 

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|  06:00
|Now, connect the other end to a '''power supply socket'''. 

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|  06:04
|This is the '''power cable''' of the CPU. 

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|  06:08
|Connect it to the '''CPU,''' as shown. 

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|  06:11
|Then, connect it to a '''power supply socket'''

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|  06:14
|Next, connect the ''' keyboard cable''' to the '''CPU,''' as shown.

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|  06:19
|The '''port ''' for the ''' keyboard''' is usually “purple” in colour. 

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|  06:23
|You can connect the mouse to the port which is “green” in colour. 

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|  06:28
|Alternately, you can connect the ''' USB keyboard''' and '''mouse''' to any of the '''USB ports. '''

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|  06:35
|The remaining ''' USB ports''' can be used for connecting ''' pen drive, hard disk''' etc. 
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|  06:42
|This is a ''' LAN cable.'''

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|  06:44
|And this is a '''LAN port.'''

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|It is a ''' wired connection''' that allows a '''computer''' to connect to a '''network'''. 

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|The other end of the ''' LAN cable''' is connected to a  ''' modem or a wi-fi router. '''

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|You will learn about configuring ''' wi-fi connections''' in another tutorial. 

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|  07:03
|The ''' LED light''' will blink, when the ''' LAN port''' is active and receiving activity. 

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|  07:10
|You may notice that there are other '''serial ports''' on the '''CPU. '''

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|  07:15
|These are used for connecting ''' PDAs, modem''' or other '''serial devices.'''

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|  07:21
|You will also notice that there are some '''parallel ports''' on the '''CPU.''' 

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|  07:25
|These are used for connecting devices like ''' printer, scanner''' etc.

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|  07:31
|Now, let's look at the ''' audio jacks.''' 

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|  07:34
|The '''port''' in “pink” is used for connecting a '''microphone.'''

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|  07:38
|The '''port''' in “blue” is for connecting a '''line in,''' for eg- from a radio or tape player. 

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|  07:45
|The ''' port''' in “green” is for connecting '''headphone/speaker''' or '''line out.'''

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|  07:51
|Now that we have connected all our devices, let's turn on the '''computer. '''

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|  07:57
|First of all, switch on the '''power supply''' buttons of the '''monitor''' and the '''CPU.'''

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|  08:03
|Now, press the ''' POWER ON''' button on the '''monitor.''' 

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|  08:07
|And then press the ''' POWER ON''' switch, on the front of the '''CPU.'''


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|  08:12
|Usually, you will see a string of words on a black screen, when your '''computer''' first turns on. 

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|  08:18
|This is the '''BIOS system''' displaying information about 

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|  08:22
|the '''computer's central processing unit, '''

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|  08:25
|information about how much memory the '''computer''' has, 

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|  08:28
|and information about the hard disk drives and floppy disk drives. 

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|  08:33
|'''BIOS''' is the software which gives the '''CPU''' its first instructions, when the '''computer''' is turned on. 

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|  08:41
|The whole process of loading the '''operating system''' is called '''booting''' the '''computer. '''

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|  08:48
|When all the necessary checks are done, you will see the '''operating system's interface. '''

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|  08:54
|If you are an '''Ubuntu Linux''' user, you will see this screen. 

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|  08:58
|And If you are a '''Windows''' user, you will see this screen. 

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|  09:02
|Now, let us briefly look at a '''laptop.'''

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|  09:06
|'''Laptops''' are portable and compact '''computers. '''

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|  09:09
|A ''' laptop''' is small and light enough to sit on a person's lap, while in use. 

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|  09:16
|Hence, it is called a ''''laptop. '''


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|  09:18
|It has most of the same components as a ''' desktop computer''' including 

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|  09:23
|a '''display, '''

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|  09:24
|a '''keyboard, '''

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|  09:25
|a ''' touchpad,''' which is the pointing and navigating device 

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|  09:29
|a ''' CD/DVD reader-writer''' and 

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|  09:32
|'''mic'''  and ''' speakers''' built into a single unit. 


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|  09:36
|It also has a ''' lan port'''  and ''' USB ports.'''

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|  09:40
|There is a ''' video port,''' using which one can connect a ''' projector''' to the '''laptop. '''

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|  09:46
|The ''' audio jacks''' are easily identifiable, with respective ''' icons''' for ''' mic''' and '''headphones'''. 

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|  09:53
|This is the inbuilt ''' cooling fan''' in the '''laptop. '''

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|  09:57
|This helps to keep the ''' laptop''' from overheating. 


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|  10:01
|A ''' laptop''' is powered by electricity via an ''' AC adapter''' and has a ''' rechargeable battery. '''

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|  10:09
|Hence, it is portable and can be used away from a power source. 


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|  10:16
|Let us summarize. In this tutorial we have learnt 

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|  10:20
|about the various components of a ''' desktop''' and ''' laptop '''

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|  10:23
|and how to connect the various components of a '''desktop  '''


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| 10:28
| Watch the video available at the following link

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|  10:31
|It summaries the Spoken Tutorial project

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|  10:34
|If you do not have a good bandwidth you can download and watch it

|-
|  10:37
| The Spoken Tutorial project team conducts workshops using spoken tutorials.

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|  10:42
|Gives certificates for those who pass an online test. 

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|  10:46
|For more details, please write to: contact@spoken-tutorial.org 

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| 10:52
| Spoken Tutorial Project is a part of the Talk to a Teacher project.

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|  10:56
|Supported by the National Mission on Education through ICT, MHRD, Government of India.

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|  11:01
|More information on this mission is available at the following link

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| 11:06
| The animation and 3D modeling for this tutorial is done by Arthi

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|  11:11
|This is Nancy Varkey from the spoken tutorial project IIT Bombay signing off.

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|  11:16
|Thanks for joining.

|}